Documentation of the sidescan sonar data format is summarized here. The sidescan data are presented in two different ways to make them available to a broader community of users. They are presented in an unmerged form and as netCDF files.
Field 1: Line number Field 2: Year - two digits Field 3: Month Field 4: Day Field 5: Hour Field 6: Minute Field 7: Second Field 8: Latitude in decimal degrees Field 9: Longitude in decimal degrees Field 10: Heading - this is 0 if heading was not logged Field 11: Uncorrected depth in meters Field 12: Corrected depth in meters - corrected for variations of the speed of sound in water.The associated sidescan image files that go with the header files have a suffix of ".img" (ie. t1f01.img). These files are 8-bit binary raw images. There is no tagged information identifying their size, but in the individual data sub-directories "unmerged" and "netcdf" of the directories "ecgloria/" and "prgloria/", there are ASCII files titled "filesize.txt" that summarizes the number of lines (NL) and samples (NS) in each file along with start and end time of each file.